The Montana S Corporation Information and Composite Tax Return (Form CLT-4S) is due for S Corporations filing on the calendar year.
If you prepare Montana returns for pass-through entities, be aware that they are subject to certain withholding requirements.
The entity may qualify for a waiver from the withholding requirements for certain owners if the owner files a Pass-Through Entity Owner Tax Agreement (Form PT-AGR).
An owner may file Form PT-AGR if they are a:
- Nonresident individual, estate, or trust;
- Tax-exempt entity administered outside Montana;
- Foreign C corporation; or
- Domestic second-tier pass-through entity
A domestic second-tier pass-through entity is a pass-through entity that is owned by resident taxpayers, including domestic C corporations and other entities whose principal place of business or administration is in Montana.
Forms PT-AGR are filed separately. Do not attach these forms to an income tax return.
Fourth quarter 2017 estimated payments are due for:
Individual Income Tax
Composite Income Tax (Pass-through Entities)
We recently mailed delinquency letters to S corporations and partnerships who have not filed their 2017 Montana tax return. These letters were sent to entities that have an open account with us and have not filed their return. The delinquency letter project helps the department keep taxpayer accounts up-to-date. The letters also serve as a reminder for entities that may have forgotten to file or that we did not receive their returns.
We appreciate the time taxpayers and their representatives take to respond to these letters. Responding helps us not only ensure compliance, but also allows us to clean up unnecessary accounts and identify any system errors. If we do not receive a response from a taxpayer, we may estimate their tax, penalty and interest.
Entities that did not have any Montana activity for the tax year in question should file the Affidavit of Inactivity for Corporations, Partnerships and Disregarded Entities Form INA-CT, to report that they were not actively engaged in business during the tax year. Alternatively, an entity should file a final return to close their account with the department if they are withdrawing with the Secretary of State or do not anticipate any future Montana activity.
- March 15
- September 15